I downloaded Interiors Pro from Microspot's website after completing the tutorial that comes with the "demo" version of the software. I have used Punch Architectural Series 4000 for Win XP, so I'm not a novice. I liked the realism of Interiors' screen shots and movies (on website) over Punch's and now have a Mac. Also the ability to create QT movies of projects. So I decided to buy it.
As it turns out, the tutorial shows you how to basically put the fininishing touches on a room. So I was not prepared for how difficult it would be to create the room itself. The user guide is not helpful (just describes the menus, item by item) and neither is the website with its brief FAQ. The user forum is very out of date with few posts.
My email to Microspot requesting a refund of my $225 was not answered for 2 days. Then I was told that because I downloaded the product rather than buying the boxed copy for $250, I was not eligible for a refund. But maybe a future update would help me with the wall problem I had.
So if you're interested in this software, be aware that you are on your own.